#CalBMIv3.py
y_or_n = input ("是否退出程序（输入y/n）：")
while y_or_n != 'y' :
    try:
        print ("请输入信息，并以空格分开")
        input_str=input("身高(米) 体重(公斤) 年龄 性别[男or女]:")
        str_list = input_str.split(' ')#注意打个空格
        height= float(str_list[0])
        weight= float(str_list[1])
        age= int(str_list[2])
        gender = str_list[3]
        bmi = weight / pow(height, 2)
        print("BMI 数值为：{:.2f}".format(bmi))
        if gender == "男":
            BMR = (13.7 * weight) + (5.0 * height) - (6.8 * age) + 66
            print("BMR 数值为：{:.2f}".format(BMR))
        elif gender == "女":
            BMR = (9.6 * weight) + (1.8 * height) - (4.7 * age) + 655
            print("基础代谢率：{:.2f}大卡".format(BMR))
        else:
            print("暂不支持此性别！")
        who, nat = "", ""
        if bmi < 18.5:
            who, nat = "偏瘦", "偏瘦"
        elif 18.5 <= bmi < 24:
            who, nat = "正常", "正常"
        elif 24 <= bmi < 25:
            who, nat = "正常", "偏胖"
        elif 25 <= bmi < 28:
            who, nat = "偏胖", "偏胖"
        elif 28 <= bmi < 30:
            who, nat = "偏胖", "肥胖"
        else:
            who, nat = "肥胖", "肥胖"
        print("BMI 指标为:国际'{0}', 国内'{1}'".format(who, nat))
        print()
        y_or_n = input("是否退出程序（输入y/n）：")
    except ValueError:
        print("身高，体重和年龄处请输入阿拉伯数字！")
        print()
